WideStudio is an Integrated Development Environment (IDE) for building window applications in C++, Ruby, Python an Perl for Windows, MacOSX, Linux, FreeBSD, SOLARIS and other unix and BTRON and T-Engine. This is open and free (under MIT/X Consortiun Lice

Omseek has been renamed to Xapian. Xapian is a Search Engine Library, written in C++ with bindings for Perl, Python, PHP, Java, Tcl, C# and Ruby. It allows you to easily add advanced indexing and search facilities to your applications. See xapian.org

Support for the Oasis XRI (Extensible Resource Identifiers) effort. This includes resolvers and client libraries for XRIs in multiple languages and multiple platforms. See http://www.oasis-open.org/committees/xri